25265012765 has 4 divisors (see below), whose sum is σ = 30318015324. Its totient is φ = 20212010208.

The previous prime is 25265012749. The next prime is 25265012777. The reversal of 25265012765 is 56721056252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12296813881 + 12968198884 = 110891^2 + 113878^2 .

It is a cyclic number.

It is not a de Polignac number, because 25265012765 - 2⁴ = 25265012749 is a prime.

It is a super-2 number, since 2×25265012765² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2526501272 + ... + 2526501281.

It is an arithmetic number, because the mean of its divisors is an integer number (7579503831).

Almost surely, 2^25265012765 is an apocalyptic number.

It is an amenable number.

25265012765 is a deficient number, since it is larger than the sum of its proper divisors (5053002559).

25265012765 is an equidigital number, since it uses as much as digits as its factorization.

25265012765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053002558.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 25265012765 in words is "twenty-five billion, two hundred sixty-five million, twelve thousand, seven hundred sixty-five".